Improvement in molding-machines



UNITED STATES PATENT UFFICE.

ALONZO S. GEAR, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN MOLDING-MACHINES.

Specification forming part of Letters Patent No. 165,669, dated July 20,1875; application filed February 6, i875,

To all whom it may concern: Be it known that I, ALONZO S'IOGKBRIDG GEAR,of Boston, county of Sufi'olk, and State of Massachusetts, have inventedan 1111 provement in Molding-Machines; and I do hereby declare that thefollowing taken in connection with the drawings which accompany and formpart of this specification, is a description of my invention sufficieutto enable those skilled .in the art to practice it.

My invention relates to that class of ma cliinery known as varietymolding or irregular planing-machines; and consists principally in thepeculiar manner of construction.

In making my frame, I use but four castings, two at the top and two atthe bottom, those on each side being exactly the reverse of those on theother. I connect these castings together laterally and vertically bypipe, securing the. whole by check-nuts. On the central horizontal pipesI place my yokes, which are so constructed as to be made adjustable, andheld firmly in position by set-- screws, thus avoiding any finish tothose parts.

The yokes being constructed separately, are arranged in such a mannerthat the slide in which the cutter-spimlle runs is moved up and downupon them by the ordinary worm screw and gear, but is made in a peculiarmanner, inasmuch as one side is fitted with a flat or V-shaped groove,which serves to keep it in position laterally, while the other sidemoves on a flat planed surface. It is held firmly in place against theyoke by means of bolts, the slide being slotted so as to allow it to bemoved up or downbythe worm and gear, as desired.

The table and cutters are constructed in any ordinary manner.

In the drawing which accompanies and forms a part of this specification,Figure 1 is a front elevation of a molding-machine constructed in themanner described. Fig. 2 is a vertical section on line was, and Fig. 3is a horizontal section on line y 3 A B represent the castings, whichare furnished with lugs or ears 0 D, through which pass the rods orpipes E, said rods being held in position by nuts F, the whole, takentogether, forming the sides of my frame, which are connected together bythe horizontal rods or pipes GH and nuts 1. On the central rods H areplaced the yokes J, which are adjusted and held in position byset-screws K. On the front of these yokes are slides .L, which are heldin, posi ion vertically by bolts M and are provided with slots N toadmit of their being raised or lowered by means of wheels 0, shafts Pturning in bosses on the castings B, worm-screws Q, gears R, screws S,and nuts T.

To prevent any lateral movement of the slides, I place upon one side ofeither the yoke or the slide a projection, U, preferably of a V-shape,and fitting in a corresponding groove, V, on the other, the oppositeside of the slide moving upon a perfectly flat surface.

These slides, being made adjustable for the purpose of raising orlowering the cutters, are furnished with bearings \V and steps X, inwhich rotate the vertical spindles Y, having at their upper ends cuttersZ, and between the bearings the pulleys A Both upper and lower bearingsmay be constructed alike, but at present I prefer to use as the lowerbearing or step the device well known as Dunklies Self-Oiling Step forVertical Spindles, while the upper bearing I furnish with anoil-reservoir, B and drill through from the bearing to the reservoirseveral small holes, 0 which may or may not be plugged with pine wood orany other suitable porous substance, which will allow sufficient oil topenetrate through and properly lubricate the spindle, and at the sametime obviate the necessity of frequent oiling, which, with the presentconstruction, is necessitated by the extreme rapidity with which thespindles revolve. v

The castings which form the upper part of the frame are provided withsockets D into which fit the cross-bars which hold the several pieces ofthe table together.

I claim 1. In a molding-machine, a frame consisting of the castings A B,held firmly in position by the hollow rods E, G, and H, said rods Hforming the supports for the yokes J, I

and vertical spindles Y, substantially as herein described.

2. In a molding-machine, a frame made up of castings and hollow tubes,as described, in combination with the laterally-adjustable yokes J,spindles Y, and cutters Z, substantially as and for the purpose hereinset forth.

Witnesses: ALONZO S. GEAR.

L. E. HAZZARD, O. WARREN BROWN.

